Top Gear has been using the Catesby Tunnel facility in Northhamptonshire, which is basically in the heart of the British Motorsport Valley. Converted for underground high-speed testing, Top Gear uses it to have some fun with some seriously cool cars. In this case, it’s a Group B spec Audi Sport quattro S1 E2, driven by The Stig of Top Gear and not the Stig of the Blomqvists… not to be confusing.
Fine more on the Top Gear Tunnel Run series HERE.